SplHeap::top

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

SplHeap::top — Peeks at the node from the top of the heap

說明

public SplHeap::top(): mixed

參數(shù)

此函數(shù)沒有參數(shù)。

返回值

The value of the node on the top.

錯(cuò)誤／異常

Throws RuntimeException when the data-structure is empty.